@article{DMGAA_2007_27_2_a1,
     author = {C\={i}rulis, J\={a}nis},
     title = {Pseudocomplements in sum-ordered partial semirings},
     journal = {Discussiones Mathematicae. General Algebra and Applications},
     pages = {169--186},
     publisher = {mathdoc},
     volume = {27},
     number = {2},
     year = {2007},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/DMGAA_2007_27_2_a1/}
}